[jira] [Updated] (AMBARI-9128) Bulk Ops on slaves for a service does not work as expected when the service is in maintenance mode

["Antonenko Alexander (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AMBARI-9128?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Antonenko Alexander updated AMBARI-9128:
----------------------------------------
    Attachment: AMBARI-9128.patch

> Bulk Ops on slaves for a service does not work as expected when the service is in maintenance mode
> --------------------------------------------------------------------------------------------------
>
>                 Key: AMBARI-9128
>                 URL: https://issues.apache.org/jira/browse/AMBARI-9128
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-web
>    Affects Versions: 2.0.0
>            Reporter: Antonenko Alexander
>            Assignee: Antonenko Alexander
>             Fix For: 2.0.0
>
>         Attachments: AMBARI-9128.patch
>
>
> ###
> I am observing inconsistency in Ambari’s behavior (1.7.0) and would like to see if we should file a bug. My Hbase is in the maintenance mode with 2 RS down.
> Next, I go to the service -> click RS link -> explicitly select all hosts with RS servers in the Hosts screen -> Actions -> Start RS.
> Ambari even pops up a confirmation screen, but then doesn’t initiate any action.
> I understand that maintenance mode prevents components from responding to bulk requests, but the behavior I described is wrong – we can’t expect an admin go an start a component on each host manually.
> I’d expect this – components won’t respond to bulk requests, but if I explicitly select hosts and perform an action – it should go through. Especially if Ambari asks me for a confirmation.
> ###
> This should go thru.  HBase is in Maintenance Mode, but specific operations on HBase itself or its slaves should work.
> PUT request to '/api/v1/clusters/HDP_2_2/host_components' sets an operation level in RequestInfo to CLUSTER. 
> {code}
> {
> 	"RequestInfo":{
> 		"context":"Start RegionServers",
> 		"operation_level":{"level":"CLUSTER","cluster_name":"HDP_2_2"},
> 		"query":"HostRoles/component_name=HBASE_REGIONSERVER&HostRoles/host_name.in(c6403.ambari.apache.org,c6407.ambari.apache.org)&HostRoles/maintenance_state=OFF"
> 	},
> 	"Body":{
> 		"HostRoles":{"state":"STARTED"}
> 	}
> }
> {code}
> But our host-component maintenance state is IMPLIED_FROM_SERVICE.
> So our API rejects state change.
> UI should set an operation_level level to SERVICE in this case.
> {{(Actions -> Selected/Filtered/All hosts -> RegionServers/DataNodes... etc)}}
> So new PUT request should looks like:
> {code}
> {
> 	"RequestInfo":{
> 		"context":"Start RegionServers",
> 		"operation_level":{"level":"SERVICE","cluster_name":"HDP_2_2"},
> 	.......
> }
> {code}



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